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Answer:

Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or the eastern horizon before sunrise, usually in twilight.

Explanation:

Answer:

molecules in a substance move around relative to each other

Explanation:

It means that molecules of a substance are mobile or locomotive or localised.

such as gases

Answer:

Have anyone found the answer to this? I’m on this grade result course right now

Explanation:

The concentration of a potassium manganate(VII) solution (KMnO4) is 10 g /L. What is the concentration of this solution in molarity is 0.06 M.

The ratio of number of moles of solute to the volume of the solution in litre is called molarity. it is denoted by symbol M.

Given concentration (C) of potassium manganate(VII) solution in g/L is 10 g /L

Molarity = C/molar mass of KMnO4 = 10g/L ÷ 158.02g/mol = 0.06 mol/L

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Answer:

V = 1.46 L.

Explanation:

Hello there!

In this case, according to the given information, it is possible for us to solve this problem based off the definition of molarity, as the moles of solute divided by the volume in liters of solution:

[tex]M=\frac{n}{V}[/tex]

In such a way, we first calculate the moles of K2(MnO4) by using its molar mass of 197.132 g/mol:

[tex]n=75g*\frac{1mol}{197.132g}=0.38mol[/tex]

Next, we solve for the volume in the equation of molarity to obtain:

[tex]V=\frac{n}{M}[/tex]

And plug in as follows:

[tex]V=\frac{0.38mol}{0.26mol/L}\\\\V=1.46L[/tex]

Regards!

Answer:

8.29g NaCl are present

Explanation:

To solve this question we must, as first, find the moles of NaCl in 260mL of the solution. These moles can be converted to grams using its molar mass (NaCl = 58g/mol)

Moles NaCl:

260mL * (1L / 1000mL) = 0.260L * (0.55mol / L) = 0.143 moles NaCl

Mass NaCl:

0.143 moles NaCl * (58g / mol) = 8.29g NaCl are present

Answer:

the addition to solute decreases the solvent's vapor pressure. a temperature must then be applied to overcome the change

Explanation:

Answer:

long story short: A

Explanation:

Answer:

Lungworms live in the lungs of bighorn sheep causing them to be sick, or even die.

Explanation:

hope this helps

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Answer:

Explanation:

Fridge magnets are made of weakly ferromagnetic ceramics like barium ferrite or strontium ferrite. The magnetic field created by the fridge magnet aligns the spins of unpaired electrons in metal atoms in the fridge in such a way that the magnet and the fridge door are attracted to each other; this force keeps the magnet stuck to the fridge.

Answer:

the fridge is a magnet

Explanation:

magnets connect to fridge

Answer:

If the data is given we can find out the density, melting point and solubility by using the formula given below.

Explanation:

Density is defined as mass of the substance per unit volume of the solution and its formula is p = mass / volume. We can calculate melting point by noting the temperature at which the particular substance starts melting. Solubility refers to the maximum amount of a substance or solute that can be dissolved in a solvent at a given temperature. Divide the mass of the compound by the mass of the solvent and then multiply by 100 g we get solubility in g or in 100g.

Answer:

9.0 moles of CaO

Explanation:

We have the reaction equation as follows;

Fe2O3 + Ca3(PO4)2 -------> 2FePO4 + 3CaO

Now we know from the equation that;

1 mole of iron III oxide yields 3 moles of CaO

Therefore;

3 moles of iron III oxide yields 3 * 3/1

= 9.0 moles of CaO

Answer:

C5P4

Explanation:

the answer is C5P4 because penta is 5 and tetra is 4

I believe the answer is number 1 but I could be wrong ><

Water is a substance composed of hydrogen and oxygen and exists in solid, liquid and gaseous state in nature.

Hydrogen is "a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements".

Oxygen is "a non-metallic chemical element of Group 16 (VIa) of the periodic table".

Solid is a state of matter in which atoms or molecules are tightly packed.

Liquid is a state of matter in which atoms are held loosely and are free to flow.

Gas is a state of matter which has no fixed shape and volume.

Hence, water exists in three states of matter.

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Answer:

It Attracts Protons And Neutrons

Explanation:

The strong nuclear force can be regarded as strong interaction. It is force which is strong enough to overcomes repulsive force that exist between two positively charged protons, and this give room for protons and neutrons to stick together in small space.This strong interaction can as well be regarded as attractive force and it binds elementary particles known as quarks together and it forms the "nucleons " which is (protons and neutrons) . It should be noted that strong nuclear force Attracts Protons And Neutrons in an atom

Answer:

c

Explanation:

edge

Explanation:

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Answer:

The correct answer is - Pine tree.

Explanation:

Coniferous trees or cone-bearing trees normally called conifers adapted their leaves and have needles like leaves that retain more water. Needles do not appear to be leaves but are modified leaves.

Conifer trees adapt this leaf modification to prevent water loss due to transpiration in the case of dry air or atmosphere. Important members of the conifer trees are pine trees, cedars, spruces, and Pines.

Answer:

Living things can have a minimum of one cell

Explanation:

Living things can have a minimum of one cell; these are called unicellular organisms. Some examples of unicellular organisms: bacteria, algae (plants), some fungi, and protozoa

hope this helps!

In an ecosystem ,cell is the minimum amount of material that must be present in a living organism.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

433 m

Explanation:

Since the fall represents motion under gravity, we use the equation

s = ut - 1/2gt² where s = height of cliff or distance bowling ball falls through, u = initial velocity of bowling ball = 0 m/s(since it starts from rest), t = time = 9.4 s and g = acceleration due to gravity = -9.8 m/s².

So, substituting the values of the variables into the equation, we have

s = 0 m/s × 9.4 s - 1/2 × 9.8 m/s² × (9.4 s)²

s = 0 m - 1/2 × -9.8 m/s² × 88.36 s²

s = 1/2(865.928 m)

s = 432.964

s ≅ 433 m

Answer:

If an object falls from one point to another point inside a gravitational field, the force of gravity will do positive work on the object, and the gravitational potential energy will decrease by the same amount

Answer:

No. If you were to set up what the friend said it would look like this:

19.7g × [tex]\frac{grams}{moles}[/tex] ==>  [tex]\frac{19.7 grams}{1}[/tex] ×

The above does not look right because the grams do not cancel out. If it's not cancelled, it would be included in your final answer, but you're looking for moles not grams.

When setting up a stoichiometry equation, you have to put the same unit of measurement (ex- grams, cm, mm, etc.) on the numerator of one side and the denominator of the other side.

This would cancel out the unit.

For example: If you wanted to find out how much of 320 cm are in a meter.

*there are 100 cm in 1 meter*

(1. always start with the given number!)

(2. set up the next fraction where you can cancel out cm)

[tex]\frac{320cm}{1}[/tex] × [tex]\frac{1 meter}{100 cm}[/tex] = 3.2 m

Going back, your friend would have to switch the units from grams/moles to moles/grams. It would cancel out grams, which would leave moles. Therefore, moles will be included in your final answer.

[tex]\frac{19.7 grams}{1}[/tex] × [tex]\frac{moles}{grams}[/tex] = _?_ moles

You will take the ratio of mass and molar mass. Hence my friend is wrong.

The formula for calculating the number of moles is expressed as:

[tex]Moles=\frac{mass}{molar mass}[/tex]

Given the following

Mass = 19.7 grams

Since the molar mass is measured in gram per mole, hence to get the number of moles, you will take the ratio of mass and molar mass. Hence my friend is wrong.

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Answer: 2.86 inches

Explanation: To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.

Answer:

2.86 inches

Explanation:

Answer:

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Explanation:

The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of coal releases sulfur dioxide, a harmful substance linked to acid rain.

Several principal emissions result from coal combustion: sulfur dioxide, which contributes to acid rain and respiratory illness.

Answer:

380

Explanation:

Q=mco

Q is the energy

M is mass

C is specific heat

O is increased in temperature

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

Explanation:

if this helped you should mark this the brainliest answer also you should join a meeting if you like it would be fun

Answer:

physical change is reversible but chemical change is irreveesable4

The molarity (M) of a solution is 11.5 M that contains 0.75 moles of lithium fluoride, LiF in a 65 ml of solution.

Molarity (M) is defined as the number of moles of solute dissolved in 1L of solution. Molarity is also known as Molar concentration. The S.I Unit of Molarity is molar (M) or mol/L.

Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]

From the above definition it is clear that the volume of solution is in liter. In question the volume of solution is given in ml.

So, convert 65 ml into l.

65 ml = [tex]\frac{65}{1000}[/tex] = 0.065 l

Now, put the values in above formula, we get that

(M) = [tex]\frac{0.75}{0.065}[/tex] = 11.5 M

Thus, the molarity of a solution is 11.5 M that contains 0.75 moles of lithium fluoride, LiF in a 65 ml of solution.

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Answer:

Percent yield = 65.2 %

Explanation:

The reaction determines this:

2 moles of Al react to 3 moles of chlorine gas in order to produce 2 mol of aluminum chloride.

We determine the moles of chlorine:

52 g . 1mol /70.9g = 0.733 moles of Cl₂

3 moles of gas can produce 2 moles of salt

Then, our 0.733 moles may produce (0.733 . 2) / 3 = 0.489 moles of AlCl₃

We convert moles to mass to predict the 100 % yield

0.489 mol . 133.3 g /mol = 65.19 g

Percent yield = (Yield produced / 100 % yield) . 100

Percent yield = (42.5 g / 65.19g) . 100 = 65.2 %

Answer:

5.3586262014272155

Explanation:

You have to go from grams --> moles --> molecules. You can find the equation online.

First you have to find the molar mass of AlF3 which is 83.98 g/mol.

To convert it to moles you simply

450.0 grams × [tex]\frac{1 mol}{83.98 grams}[/tex] = 5.358 mol

To convert mol to molecules: (multiply by Avogadros # = 6.022*10^23)

5.358 mol × [tex]\frac{6.022*10^2^3}{1mol}[/tex] = [tex]3.23 *10^{24}[/tex]